10.12 + Force Touch Trackpad - corners not working?

I encountered a problem with Sierra on my 12" rMB and I'd like to know if I'm the only one; tried the search function but couldn't find anything...

After updating to the Beta, the Force Touch trackpad showed a strange behavior: the upper corners do not seem to be working as intended, they simply don't react at all. No feedback, no function. Just like with the old, hinge-mounted trackpads. But not only the upper corners are affected, but sometimes the upper area in general. When first clicking the dead center and then "moving upwards" everything is okay, but when trying to directly press one of the upper corners, nothing happens. At all.

Thought about a hardware issue, but nope, after resetting to El Capitan it works smoothly again.
Has anyone encountered similar problems? Just curious, because it's a kinda weird behavior/bug imo.

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